Remove comments on WAF diagnostics object handling

Removed comments about WAF diagnostics object allocation and reuse.

Author: dromanol

tracer/src/Datadog.Trace/AppSec/Waf/Initialization/WafConfigurator.cs

@@ -252,9 +252,6 @@ internal UpdateResult Update(IntPtr wafBuilderHandle, ConfigurationState configu
                                 var configObj = encoded.ResultDdwafObject;
                                 var path = config.Key;
 
-                                // the WAF allocates a fresh diagnostics object on every call and overwrites the
-                                // one it is given without freeing it, so it can't be reused across the loop: only
-                                // the last one is reported, the previous ones have to be released here or they leak
                                 var configDiagnostics = default(DdwafObjectStruct);
                                 if (!_wafLibraryInvoker.BuilderAddOrUpdateConfig(wafBuilderHandle, path, ref configObj, ref configDiagnostics))
                                 {